2020 Ronstan Sailboat Hardware Catalogue - Page 32



SPORTS BLOCKS
30
Series 55 Orbit
RF55110
RF55410
RF55210
Integrated becket
RF55310
RF55410
RF45201
see page 18
RF9004-09
see page 33
RF56330B
see page 36
9:1 MAINSHEET
SYSTEM
RF150
4.8mm (3/16”) pin.
2-stage ball bearing system.
Swivel shackle head for unlimited block rotation.
Single inner cheeks on multi-sheave blocks
for reduced weight and bulk.
Ultra-low profile integrated becket.
PRODUCT No.
DESCRIPTION
Ball Bearing
RF55110
Single block, becket, swivel shackle head
RF55210
Double block, becket, swivel shackle head
RF55310
Triple block, becket, swivel shackle head
RF55410
Quad block, becket, swivel shackle head
Mainsheet systems on dinghies, catamarans,
sportsboats and small keelboats to 9m (30ft).
Halyard, vang and backstay applications
on boats to 8m (26ft).
RF55410 when paired with a RF56330B and a
RF45201 lashed to the becket with a RF9004-09,
produces a powerful 9:1 mainsheet system for
use on catamarans to 5.5m (18ft). 8mm (5/16”)
rope recommended.
Control line applications on larger yachts.
SHEAVE
DIAM.
mm
55
55
55
55
MAX.
ROPE PIN DIAM. M.W.L.
mm
mm
kg
10
10
10
10
5
5
5
5
500*1
750*2
750*2
750*2
Swivel shackle head fitting: Grade 316
stainless steel.
B.L.
kg
WEIGHT
g
SHEAVE
DIAM.
in.
1000
1500
1500
1500
88
172
244
316
2 5/32
2 5/32
2 5/32
2 5/32
*1 Total block load. Load on becket not to exceed 50% of block load. i.e. MWL 250kg (550lb), BL 500kg (1100lb). Suitable for 2:1 system at rated block load.
*2 Total block load. Load on becket not to exceed 33% of block load. i.e. MWL 250kg (550lb), BL 500kg (1100lb).
MAX.
ROPE PIN DIAM. M.W.L.
in.
in.
lb
3/8
3/8
3/8
3/8
3/16
3/16
3/16
3/16
1100*1
1650*2
1650*2
1650*2
B.L.
lb
WEIGHT
oz
2200
3300
3300
3300
3.1
6.1
8.6
11.2

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